In other words, whether you’re an avid PUBG player or spend nights obsessively streaming Call Of Duty tournaments, the influence of this multiplayer masterpiece is evident almost anywhere you find a virtual gun. It’s the shooter that kickstarted esports and even helped developer Valve popularise a little digital distribution platform called Steam. Counter-Strike has been around for 20 years, and like a particularly well-aimed frag, its impact on the games industry is still being felt today.